#!/usr/bin/env node
const log =console.log;
const user = {
  name:'tianyuxuan',
  age:20,
  qq:'2605740794'
};
log('name:\t%s',user.name);
log('age:\t%d',user.age);
log('qq:\t%s',user.qq);
log("user:\t%j",user);

log('qq:\t'+user.qq);
log('qq:\t',user.qq);

console.table(user);
console.error('error message');
